[llvm] [SCEVAA] Allowing to subtract two inttoptrs with different pointer bases (PR #91453)

[Eli Friedman via llvm-commits]

efriedma-quic wrote:

See https://reviews.llvm.org/D104806 for why getMinusSCEV works this way.  I would rather not relax the current restrictions.

What happens if you make SCEVAA explicitly PtrToInt the operands to the subtraction?

https://github.com/llvm/llvm-project/pull/91453